An automated guided vehicle (AGV) is a robot cart that runs without a driver. The cart has an electric engine and is guided by a magnetic field, produced by a wire on or just beneath the floor. Alternatively, an AGV can run on a set of rails. In automated systems, AGVs are used to bring components to assembly lines. AGVs can also serve as attendants in hospitals, bringing food and nonessential items to patients, or as mechanical gophers to perform routine chores around the home or office.